Foster County, North Dakota Demographics 2026

Population Overview

Foster County is located in North Dakota with a total population of 3,372. It is the 32nd most populous county out of 53 in North Dakota. The county encompasses 4 Census-designated places.

Age Demographics

The median age in Foster County is 43.3 years. This is 21% higher than the state median of 35.7 years. 10.7% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Foster County is $83,412. This is 10% higher than the state median of $75,949. Compared to the national median of $78,538, household income here is 6% higher. The poverty rate stands at 9.1%. This is 14% lower than the state poverty rate of 10.6%. The unemployment rate is 0.1%. This is 96% lower than the state rate of 2.8%. The median home value is $162,800. Housing costs are 32% lower than the state median of $241,100. With a home-value-to-income ratio of just 2.0x, Foster County is one of the most affordable housing markets in the area. 77.4% of occupied housing units are owner-occupied. This homeownership rate is 22% higher than the state average of 63.4%.

Race & Ethnicity

Foster County has a predominantly White (non-Hispanic) population, comprising 94.0% of all residents. Asian residents account for 1.3%. The Black or African American population (0.4%) is well below the state average of 3.2%. The Hispanic or Latino population (0.8%) is well below the state average of 4.5%.

Education

27.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 16% lower than the state rate of 32.3%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.2%.